I keep getting 5 minute voice chat bans

When i use roblox voice chat i keep getting voicechat banned for 5 minutes. this never used to be a problem but recently this has started happening. i never say anything that should be against the terms of service. i could go into any voice chat game for like 5-10 minutes talking not saying anything bad and then getting 5 minutes suspended. I've appealed for this and have done their solutions yet none of them have worked. if you know any solutions or anything that could help please tell me. thanks