Hi ...
Generally, flashes indicate some kind of pull on the retina by the jelly inside. In this situation , we need to do a Retina checkup. Since you have already done a retina treatment and under doctors care ...should be ok...they will settle down slowly.
Next Steps
Be under the care of your retina doctor
do report to him/ her ..any sudden increase in flashes, floaters or a curtain like thing coming in front
.