Thumb release holster for 4:00 carry?

I don’t carry my Glock 19.4 often (usually I carry a p365 in a pocket holster), but when I do I carry at 4:00. I use a basic kydex IWB holster when I do.One of the downsides of carrying at 4:00 is that sometimes when I reach down the back of my shirt will either lift up to expose the gun or it will print. My concern is that someone could use this opportunity to pull the firearm from my waist. Is there a solid holster you would recommend for 4:00 IWB carry? Is there a holster with a thumb mechanism on the market for this type of carry?Thanks! via /r/CCW https://ift.tt/3nYQ4Jc