Please use this thread to report any bugs found in Astrominer. Add as much detail for the repro steps as possible, and screenshots would be greatly appreciated (but not mandatory). Thanks!
Thanks for taking the time to send this report! I believe I have resolved this issue-- it was related to trying to dig dirt blocks with no item equipped in your hands (which is most likely to occur when the item breaks during use and your next swing is counted as an empty hand). I'm in the middle of updates at the moment, but hopefully it won't be too long before I update the build here and get this resolved for everyone. Thanks again for reaching out :)