Caller ID is wrong on VoLTE-enabled Qualcomm devices

Recently, I've turned on VoLTE and I get an identifier on screen, but the real caller is another person. This happens randomly. Normally the ID showed is the last that I received a call from.

Edit: I'm not completely sure, but I tried (I know it sounds silly, but):

• Turn VoLTE on
• Make person1 call me (don't answer)
• Make person1 call me (answer)
• Wait until passed 00:00h (a number of hours?) Nope. Not day-change required. From different companies?
  • I think I got it? It happened related to my mum (Yoigo phone company): - Or my mum calls and then next first call from another person shows my mum or - Somebody calls and the first call after that my mum does, it shows previous caller
  • Nope. Today it happened and it was between a call from my husband and a friend. But...
  • I received a call (didn't answer) from friend
  • Called husband (no connection, he was out of range)
  • Received husband's call (picked up)
  • Called friend. He was out of range.
  • Friend called me, id was from my husband
• Make person2 call me (it shows as person1)
• Make person2 call me (it shows as person2)