Please send us a video recording of the screen showing the problem you are facing to help us fully understand the situation. Also, could you please specify the version of Nextcloud you are using? Thank you.
Would it be possible for you to share a Nextcloud account with us, so that we can investigate the matter in question more thoroughly? Having access to the account would allow us to get a better understanding of the situation.
Understood. Could you please try checking the situation on another device, if you have one available? This might help us determine if the issue is specific to the device you are currently using or if it is a wider problem.
Interesting. It works on my tablet. It’s a Samsung tab running a Lineage GSI build for Android 12.
I can try recording a log on my phone. Would it help?
Apologize for the late response. We have checked your situation on several devices running Android 11, but were unable to reproduce the issue. Could you please check if opening .xlsx files works in the mobile browser rather than the app?
Apologize for the late response. At the moment, we are working on this situation and hope that the new version of OnlyOffice for Android will resolve this situation. We ask you to wait a bit and apologize for the inconvenience.