zero qty orders in chart and orders

[chappjc]

Leaving the markets page open for a long while, returning to this:

F5:

Both the depth chart and the orders lists have indicate something strange with the order feed.

v0.1.1 release

Originally posted by @chappjc in https://github.com/decred/dcrdex/issues/824#issuecomment-725791277

[chappjc]

The symptom seems to be zero qty sell orders building up in the list

and the depth chart getting a zero quantity level on the buy side.

[amass01]

will be investigating that after my current task.

@vctt94 will be investigating this.

[chappjc]

Got it while testing LTC-DCR

But only on the depth chart, not the tables.

Possibly unrelated: Then when refreshing the page, spinner and no draw of market

[chappjc]

Sort of resolved by https://github.com/decred/dcrdex/pull/1543