Wrong Key for song?

[dflat]

... the chords don’t match. Period. It used to work fine, as of late they don’t conform with the proper key....

Have you inadvertently changed the global key (wind instruments). If you do not play a wind instrument, change to default C for Concert key. Or change it to your wind instrument's transposing key as it might be set to another.
https://technimo.helpshift.com/hc/en...ent/?p=android