I did not have a freeze with the 5.4.x LTS Kernel. How long have you had a freeze with LTS Kernel? For my part, I have experienced this freeze on both laptops and desktops with 5.6.x Kernels. Returning to the LTS Kernel, there has been no freezing so far. This may also have something to do with the case. https://linuxreviews.org/Linux_Kernel_5.5_Will_Not_Fix_The_Frequent_Intel_GPU_Hangs_In_Recent_Kernels