after plot-merge: all signs deleted or wrong sign-location

Server Implementation

Paper

Server Version

1.16.5

Describe the bug

It's still a problem with plot-merge at now. But not with unmerge! And at this time we haven't 2 or more signs at one merged plot like earlier.

For example, we have 4 plots. And one owner. After all follow steps we use "/p unmerge"!

Situation A:

the owner standing on plot 1 and looking to plot 2 (east)
= PS "remove all signs" and "set" the new plot-sign on the left top side -->OK

Situation B:

the owner standing on plot 2 and looking to plot 1 (west)
= the plugin down't break the sign on the plot where the player standing on (the problem behind all)

Situation C:

the owner standing on plot 2 and looking to plot 3 (south)
= PS "remove all signs" and "set" the new plot-sign on the left top side -->OK

Situation D:

the owner standing on plot 3 and looking to plot 2 (north)
= PS "remove all signs" and "set" the new plot-sign on the old path ... and then PS delete all paths in the plot --> this merged plot hasn't a sign.

I hope this was understandable with this step-by-step tutorial at now. :)

tested with PlotSquared (premium) 5.11.1 + 1.15.2 PaperSpigot 300

To Reproduce

See picture and follow the steps. Replicable with the merge command.

Expected behaviour

one signs for one merged plot

Screenshots / Videos

see description

Error log (if applicable)

No response

Plot Debugpaste

if it's needed, I can link an newer debug report with an newer test

PlotSquared Version

last tested with 5.11.1

Checklist

• I have included a Plot debugpaste.
• I am using the newest build from https://www.spigotmc.org/resources/77506/ and the issue still persists.

Anything else?

no "/plot debugpaste" needed, but I can add it with an newer test

Copy of YouTrack

Start by reproducing the reported /plot merge and /p unmerge cases with four adjacent plots, following the directional situations in the issue and checking sign and path locations. Done means merged plots retain exactly one correctly located sign in every direction, without deleting the wrong sign or paths unexpectedly.