Text messages show up on recipient's phone under the wrong number

[WisdomHunter]

i am sending texts and the recipient (my daughter) is intermittently receiving them under  different (random) numbers.  I have had this #S20 for over a year and this issue just started occurring today.  I decided to try Google Messages instead, based on a suggestion in a similar thread posted for the #S21, but the problem is still occurring intermittently

[AaronAJ]

@WisdomHunter Have you recently changed your number? I'd recommend contacting your network provider to provide a replacement SIM to see if this is the issue.

[WisdomHunter]

No, my number has not changed.  I've had it for years. 

[AaronAJ]

@WisdomHunter I'd recommend getting a replacement SIM card and make sure there are no obstructions or blocks on your account which is causing this. If this doesn't help, come back and I'll be happy to look into this further.

[-Robot-]

I would say contact your network provider