I can't confirm now because I moved to another phone.
What I can tell is it was corrected some weeks ago (5 or 6 weeks) and confirmed as solved.'(Nobody complained anymore=)
I'll check it by tomorrow with this phone model.
EDIT:
I made the check and the switch is working well on this phone.
I've done 20 tests changing the band frequency every time without miss.
It failed one time to turn back to 5Ghz but returned well at second switch on.
MI9T EU rom 20.3.19 weekly
I can't confirm now because I moved to another phone.
What I can tell is it was corrected some weeks ago (5 or 6 weeks) and confirmed as solved.'(Nobody complained anymore=)
I'll check it by tomorrow with this phone model.
EDIT:
I made the check and the switch is working well on this phone.
I've done 20 tests changing the band frequency every time without miss.
It failed one time to turn back to 5Ghz but returned well at second switch on.
MI9T EU rom 20.3.19 weekly