
Hi @Chris Cole
Could you please tell us which version of Office are you using now?
On my test environment with Microsoft 365 Apps installed, this issue can not be reproduced.
Have you assigned any table styles to this table?
I would like to suggest you create a new blank document, and insert a simple table (No table style, no border style and other format settings) to check this issue.
To better analyze this issue, it's recommended to right-click on the table > Propertities > Table tab, then take a screenshot.
Then click Options button, take a screenshot, and then share us with these 2 screenshots.
Besides, select each cell of third row (The new paste line), go to Layou tab, check the Height and Width for each cell.
Please right-click on the whole table > AutoFit > AutoFix to Windows to have a check.
Any updates, welcome to post back.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.