USB Mouse & SharedCLibrary

I keep having intermitent issues where my USB mouse doesn’t work when RISC OS starts.
If I unplug the mouse and plug it back in again, I get an error about an application may have gone wrong.

ShareFS then quits and the mouse still doesn’t work.

I’m using RISC OS 5.21 (24-Dec-2013) on the Raspberry Pi. (512MB Model B)

Here is the output from *where *showregs;

*where
Address FC1758F8 is at offset 0000CA34 in module SharedCLibrary
*showregs
Register dump (stored at &20009490) is:
R0 = 20335205 R1 = 0000E59F R2 = 0000E59B R3 = 0000009F
R4 = 200EB900 R5 = 20326C34 R6 = 20326C34 R7 = 00000000
R8 = 0000E5D3 R9 = 00000008 R10 = FA20021C R11 = FA207CD4
R12 = 00000001 R13 = FA207CB0 R14 = FC1D6F64 R15 = FC1758F8
Mode SVC32 flags set: NzcvqjggggeAift PSR = 80000113
*help sharedclibrary
==> Help on keyword SharedCLibrary
Module is: C Library 5.78 (24 Oct 2013)

Since using a different mouse, I’ve not had this issue again.