Print output keeps scrolling back to top line when another line is output

[greazer]

# %%
import time

for x in range(0, 63):
    print("We're on time %d" % (x))
    time.sleep(1)

Let this run in the interactive window until you have to scroll the output. Scroll to the bottom line. In a second the output will snap back to the top.

[rchiodo]

This is not in the shipping bits. Only in master. And the shipping bits are kinda crappy in this situation too. They don't scroll at all.

[greazer]

This bug repros for me in the latest released build of the extension. 2020.2.63072.

[rchiodo]

But not in the one before it?

[greazer]

Actually the repro seems flaky. Sometimes it happens sometimes it doesn't. I've seen it repro in both 2020.2.62710 and 2020.2.63072. I haven't been able to get it to repro in 2020.1.58038. So seems like a likely regression in the first February release

[DonJayamanne]

Validated