X3.5手机端，发帖上传附件（例如PDF、MP3）显示问号，无法正常上传附件。上传图片则正常 New
X3.5手机端，发帖上传附件。上传PDF，和MP3，插入后，都会显示❓️问号但手机浏览器切换到桌面版的编辑器，进行上传，就没有任何问题。仅仅只有在手机版中，上传附件是这样的。上传图片则是很正常。怎么才可以解决这个问题呢？我的版本是X3.5
手机端编辑器，上传附件，无论是什么文件格式。上传都是显示问号
发布后，前端显示，也是问号，附件无法正常显示，也无法正常下载
我知道答案 回答被采纳将会获得1 贡献 已有2人回答 提供具体版本号，复现步骤，浏览器，环境等
.ce-block { margin-bottom: 20px;}.ce-block__content,.ce-toolbar__content { /* max-width:calc(100% - 50px) */ margin-left: auto; margin-right: auto;}.ce-paragraph { line-height: 1.6em; outline: none; text-indent: 2em; font-size: 16px;}.ce-paragraph--right { text-align: right;}.ce-paragraph--center { text-align: center;}.ce-paragraph--left { text-align: left;}.ce-paragraph--justify { text-align: justify;}.ce-paragraph-text-indent { text-align: justify;}.ce-paragraph:empty::before{content: attr(data-placeholder);color: #707684;font-weight: normal;opacity: 0;}/** Show placeholder at the first paragraph if Editor is empty */.codex-editor--empty .ce-block:first-child .ce-paragraph:empty::before {opacity: 1;}.codex-editor--toolbox-opened .ce-block:first-child .ce-paragraph:empty::before,.codex-editor--empty .ce-block:first-child .ce-paragraph:empty:focus::before {opacity: 0;}.ce-paragraph p:first-of-type{ margin-top: 0;}.ce-paragraph p:last-of-type{ margin-bottom: 0;}.svg-icon { width: 1em; height: 1em;}.svg-icon path,.svg-icon polygon,.svg-icon rect { fill: #4691f6;}.svg-icon circle { stroke: #4691f6; stroke-width: 1;}.ce-block { margin-bottom: 20px;}.ce-block__content,.ce-toolbar__content { /* max-width:calc(100% - 50px) */ margin-left: auto; margin-right: auto;}.image-tool {--bg-color: #cdd1e0;--front-color: #388ae5;--border-color: #e8e8eb;}.image-tool__image { border-radius: 3px; overflow: hidden; margin-bottom: 10px;}.image-tool__image-picture { max-width: 100%; vertical-align: bottom; display: block; margin-left: auto; margin-right: auto; }.image-tool__image-preloader { width: 50px; height: 50px; border-radius: 50%; background-size: cover; margin: auto; position: relative; background-color: #cdd1e0; background-position: center center; }.image-tool__image-preloader::after { content: ""; position: absolute; z-index: 3; width: 60px; height: 60px; border-radius: 50%; border: 2px solid #cdd1e0; border-top-color: #388ae5; left: 50%; top: 50%; margin-top: -30px; margin-left: -30px; animation: image-preloader-spin 2s infinite linear; box-sizing: border-box; }.image-tool__caption::before { position: absolute !important; content: attr(data-placeholder); color: #707684; font-weight: normal; display: none; }.image-tool__caption:empty::before { display: block; }.image-tool__caption:empty:focus::before { display: none; }.image-tool--empty .image-tool__image { display: none; }.image-tool--empty .image-tool__caption, .image-tool--loading .image-tool__caption { display: none; }.image-tool .cdx-button { display: flex; align-items: center; justify-content: center;}.image-tool .cdx-button svg { height: auto; margin: 0 6px 0 0; }.image-tool--filled .cdx-button { display: none; }.image-tool--filled .image-tool__image-preloader { display: none; }.image-tool--loading .image-tool__image { min-height: 200px; display: flex; border: 1px solid #e8e8eb; background-color: #fff; }.image-tool--loading .image-tool__image-picture { display: none; }.image-tool--loading .cdx-button { display: none; }/** * Tunes * ---------------- */.image-tool--withBorder .image-tool__image { border: 1px solid #e8e8eb; }.image-tool--withBackground .image-tool__image { padding: 15px; background: #cdd1e0; }.image-tool--withBackground .image-tool__image-picture { max-width: 60%; margin: 0 auto; }.image-tool--stretched .image-tool__image-picture { width: 100%; }.image-tool__caption { text-align: center; font-size: 14px; color: #a3a3a3; }@keyframes image-preloader-spin {0% { transform: rotate(0deg);}100% { transform: rotate(360deg);}}.inline-code {background: rgba(250, 239, 240, 0.78);color: #b44437;padding: 3px 4px;border-radius: 5px;margin: 0 1px;font-family: inherit;font-size: 0.86em;font-weight: 500;letter-spacing: 0.3px;} 版本：Discuz! X3.5 Release 20250901 UTF-8
浏览器：手机VIVO浏览器，手机Edge浏览器，手机Chrome浏览器，都一样会这样的情况
复现步骤：手机浏览器，发帖/编辑帖子，点击【上传附件】按钮，选择MP3文件或PDF文件（其他格式暂未尝试过）
环境：IQOO手机，安卓，VIVO的，oriainos5系统
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