After add discount, price is not visible:
In which resolution are you checking? I have checked in FF and chrome both are fine and no issues. Please clear browser cache and check again.
Please share your browser version, go to Browser -> About and copy paste the version here. Also, what operating system are you using? Version / Update? I’ll tag @rosssimpson who is part of the Envato Engineering Team, but they need as many details as possible to setup a testing environment and fix this issue. Cheers!
Seem you are right, works fine with latest browser.
This happen on my laptop where I use Firefox Developer Edition (version 69.0b1).
It’s even an old version of browser.