I’m having the same issues as well.
Same issue, raynor, kerrigan and artanis reset to lvl 5, hope support can fix it soon, it has been days already
same issue though this happened starting 2 days ago.
the 3 commanders are currently capped at lvl 5.
I had the 3 commanders raynor, quenn of blades and artanis reset to level 5 a for a couple of days.
Problem is still persisting. 2/13.
Is there an ETA for when this will be fixed? Will this become like the master league border bug that didn’t get fixed for about half a year and still pops up occasionally?
Same issue with Artanis, Kerrigan, and Raynor.
Thanks for posting that. Kerrigan’s one of the ones I have got up to maximum on P3.
I also have this issue with Raynor, Kerrigan and Artanis. I had them all at level 15 but now they appear capped at level 5.
Same reset for me !
i hope my level will be back 
Same here, Logged in to find all 3 had been reset
Still have the three Raynor/Kerrigan/Artanis at lvl 5, previously got Kerrigan once on random and she played as lvl 5 without changing after the game. I met someone who had access to Artanis higher level and they said they played one game and reset - I tried that with Raynor just now but it didn’t do anything, he’s still capped at 5.
Same issue here. Kerrigan, artanis, and Raynor are all down to 5, and won’t allow level progression, it says that I need to purchase them despite their already being maxed, and (quite hilariously) there is no option to purchase them
If u create another character in another region like Asia or Europe it should unlock the campaing u wanna play.
Also have my 3 commanders stuck at level 5. My other leveled commanders are fine however.
I had my Stukov over level 30 and he was reset to level 1 with the rest of my commanders
I have the same issue. Raynor, Kerrigan and Artanis (on US server only, I play co-op on those characters on Korea/Asia and Europe and have NOT had the same issue) have been reverted to level 5 despite me reaching level 15 with them with all prestiges on my main, and having level 15 on my secondary (both on US, linked account post-SEA migration) before.
my kerrigan progress is gone. reset from prestige 1 lvl 13 to level 5 capped
i have the base 3 all went from mastery lvl to lvl 5 and sat i have to buy them. the 3 i have bought (fenix, daheka, and mensk) are all still at normal lvl.
My progress has also been brought down to level 5 on Raynor and Artanis.