Webpart throwing error on mobile/in mobile emulation

[sliziky]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

💥 SharePoint Framework

Developer environment

Windows

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

• browser version
• SPFx version 1.18.0
• Node.js version 16.14.0
• etc

Describe the bug / error

I have built an SPFx package containing 1 form webpart and deployed it into Sharepoint A (site collection app catalog) and Sharepoint B (global app catalog):

• Sharepoint A - web part is fully working (desktop/mobile emulation/mobile)
• Sharepoint B - when browsing on desktop it works fine, but as soon as I switch to mobile emulation/mobile I get this on-screen error:

ERROR:
Script error for: f3a9abfa-9d4a-457a-88dc-07b89b53bf8a_0.0.1/ControlStrings
http://requirejs.org/docs/errors.html#scripterror

CALL STACK:
Error: Script error for: f3a9abfa-9d4a-457a-88dc-07b89b53bf8a_0.0.1/ControlStrings
http://requirejs.org/docs/errors.html#scripterror
    at B (eval at e (https://res-1.cdn.office.net/files/sp-client/sp-pages-assembly_cs-cz_c113e52d950edbc28a80ec2e906317e2.js:198:10340), <anonymous>:8:252)
    at HTMLScriptElement.onScriptError (eval at e (https://res-1.cdn.office.net/files/sp-client/sp-pages-assembly_cs-cz_c113e52d950edbc28a80ec2e906317e2.js:198:10340), <anonymous>:30:244)

and also this Console error:

Could not load form-web-part in require. Error: Script error for: f3a9abfa-9d4a-457a-88dc-07b89b53bf8a_0.0.1/ControlStrings
http://requirejs.org/docs/errors.html#scripterror
    at B (eval at e (sp-pages-assembly_cs-cz_c113e52d950edbc28a80ec2e906317e2.js:198:10340), <anonymous>:8:252)
    at HTMLScriptElement.onScriptError (eval at e (sp-pages-assembly_cs-cz_c113e52d950edbc28a80ec2e906317e2.js:198:10340), <anonymous>:30:244)

as soon as I cancel emulation and do refresh, the error is gone.

I have also tried with SPFx 1.18.2 and 1.12.1 but happens all the time. Could there be any problem with Sharepoint settings? Catalog?

Thanks

Steps to reproduce

1. Deployed SPFx package and added it into site
2. Added webpart into sitepage
3. Webpart throws error in mobule emulation

Expected behavior

I expect Sharepoint to render webpart in mobule emulation

[sliziky]

UPDATE - We have tested the solution on multiple browsers on Android and the only one that works is Firefox - Edge/Chrome/Opera crash.

[Amey-MSFT]

Hello @sliziky,
Thank you for bringing this issue to our attention. Could you please confirm if the issue still persists for you?

[Amey-MSFT]

We are closing this issue for now. If the problem persists, feel free to reopen it or open a new one.