Yes, problem could be come from upgrade aircraft, after en New Micro SD. And could be the Write speed.
It was my case with a new Samsung Evo Plus 64Gb. I was not sure about a "true Samsung" or a "fake/pirate" SD Card.
Lot of fake Samsung on Market from China...
That is why I wanted to check the Write Speed with this very great software : H2testw (freeware) check Youtube guy explain
- 1st is writing card, you can verified the speed,
- 2nd is reading card, to confirm great writing and speed,
After Write speed confirm, go for Upgrade Aircraft, my recognize the new Micro SD after the Upgrade.