Read access stops when read/write access is repeated

Read access stops when read/write access is repeated.
Run the following program.

******************************************************************************************
.text
.align 4

.global acctest
//
//I=====================================================
//I Access test for chattering access problem
//I=====================================================
//I void acctest(unsigned int adr, unsigned int *in);
acctest:
csrrsi a2, mstatus, 0x08
lw a3, 0(a0)
sw a3, 0(a1)
csrrw zero, mstatus, a2
jalr zero, ra, 0 /* ret */

.end
******************************************************************************************

Read accesses stop, but write accesses continue.
I am running a simulation in VCS.

Start by reproducing the reported behavior in VCS with the assembly entry point acctest and its repeated read/write sequence. Inspect the simulation around the mstatus update and memory accesses to determine why reads stop while writes continue. Done means the cause is identified and the access behavior matches the intended result, which the issue does not yet specify.

Written by the indexing model from the issue text.