If I understand it correctly, then holding down the mouse button while building belt should not replace a splitter, if you started building on a belt.
This seems to work only sometimes. See e.g. https://clips.twitch.tv/TrustworthyArbi ... selPrimeMe
Testing out (copying what AntiElitz did), it seem fairly easy to reproduce. It overbuilds sometimes, and sometimes not.
[0.17.54] Building belt will sometime overbuild splitter
Re: [0.17.54] Building belt will sometime overbuild splitter
Thanks for the report. It's now fixed for the next version of 0.17.
If you want to get ahold of me I'm almost always on Discord.