They are both running Via browser, no Chrome for me. The smartphone is mostly degoogled, but still has Google Play Store and Google Play services which are required for my work apps. The tablet has these removed and is using Aurora Store and F-Droid for software.
I'm sure Google probably has something causing this issue. I'm not going to, but I'll bet if I put Google Play Store, Google Play services as well as Google services framework back in the tablet the Via browser would then work for this forum. For what it's worth 90% of Google Play Store apps work fine without Google despite the warnings that it is required. Google, Apple, and Microsoft has managed to pervert software so that you are essentially spying on yourself and they actually don't have to do anything to compromise your privacy.
The second I log out of work my smartphone is turned off and placed in a faraday pouch. Sounds really paranoid doesn't it?
If you aren't aware of what your electronic devices are actually doing, watch a few of Rob Braxman's Youtube videos.
Degoogled or not this problem simply reminds me that I should use Linux only. The tablet will be missed for it's convenience, but it's going to be stored away and only used for extreme situations where a desktop or laptop isn't feasible.