Lost all my Bro-Mon randomly one day

Bro-Mon Bug Busters
1

I randomly lost all my bro mon one day. i had like so many epics rares and a legendary and now i have to restart everything. please get this fixed

2

wait for it to load, I thought I lost all too, its because of the new v3.0 update

3

all your bromons come back, i think

4

but the win loss data is deleted