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The Xtensa load/store handler did not properly handle 8/16-bit memory access to IRAM regions configured with MALLOC_CAP_IRAM_8BIT (and CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY=y) from a loop (LBEG/LEND/LCOUNT) context. This caused the loop to exit after the first access, instead of continuing to iterate as intended. Closes https://github.com/espressif/esp-idf/issues/14127