I have been using LR Classic to make books for years before sending to Blurb to be printed. Over the last month whenever I work in the Book Module after about 1 1/2 -2 hours everything slows down. I start getting the spinning blue wheel and if I try to move a photo from one cell to another it hangs up before able to move. It eventually gets so bad that get a whiteish screen and warning that LR is not Responding. I then have to stop and exit out of LR and sometimes this works but other times it does not. I have even tried to do a backup and again sometimes this helps but not always. I am at my wits end and hope someone can help.
Our computer has 32 GB of RAM and with both our catalogue and photos on the same internal 6 TB drive with over 2TB of free space. All of our other programs and files are on an internal 500 GB SSD drive. Our video card has 4 GB of Ram as well.
Another problem that has just occurred is that again when in the Book Module and we have a finished book and we want to make a jpeg of it we cannot. Usually we go to our Book Settings and change in this case from Trade Book or other type of book to jpeg. When we now do this and click on the JPEG at the bottom right we get a window that tells us we must change the format of our book. If you do this then the order and contents of the book is changed as well as we have created custom cells on some pages. I have included a screen shot to help you understand this.