keepalive crash

gistfile1.txt

>> [27647525] HomeKit: [Client 1073689364] Pair Verify Step 2/2
>>> [27647532] HomeKit: [Client 1073689364] Found pairing with EE8FD393-6191-4500-81B8-4E70B598D92A
>>> [27647562] HomeKit: Call ge_double_scalarmult_vartime_lowmem in ge_low_mem.c
>>> [27649003] HomeKit: [Client 1073689364] Verification successful, secure session established
>>> [27649012] HomeKit: Free heap: 19880
>>> [27649034] HomeKit: [Client 1073689364] Get Accessories
>>> [27649055] RATGDO: get active: 0
>>> [27649060] RATGDO: get current door state: 0
>>> [27649065] RATGDO: get target door state: 0
>>> [27649073] RATGDO: get obstruction: 0
>>> [27649078] RATGDO: get current lock state: 0
>>> [27649083] RATGDO: get target lock state: 0
Exception (28) - LoadProhibited: A load referenced a page mapped with an attribute that does not permit loads
epc1=0x4023a3d2: WiFiClient::keepAlive(unsigned short, unsigned short, unsigned char) at ??:?
sp: 3fff24f0 end: 3fff2900 offset: 0150

ctx: cont
0x40228434: client_send_encrypted_(_client_context_t*, unsigned char*, unsigned int) at ??:?
0x3ffe8368: ?? at /workdir/repo/newlib/newlib/libc/reent/impure.c:23
0x402285b0: client_send(_client_context_t*, unsigned char*, unsigned int) at ??:?
0x4022866e: client_send_chunk(unsigned char*, unsigned int, void*) at ??:?
0x4023f491: vsnprintf at /workdir/repo/newlib/newlib/libc/stdio/vsnprintf.c:41
0x4021bc92: json_flush at ??:?
0x402054ee: json_write at ??:?
0x402057da: _json_number at ??:?
0x40205a04: json_string at ??:?
0x40227e19: write_characteristic_json(json_stream*, _client_context_t*, _homekit_characteristic const*, characteristic_format_t, homekit_value_t const*) at ??:?
0x402057da: _json_number at ??:?
0x4022960f: homekit_server_on_get_accessories(_client_context_t*) at ??:?
0x4022c0fd: homekit_server_on_message_complete(http_parser*) at ??:?
0x40204b00: http_parser_execute at ??:?
0x4022aaed: homekit_client_process(_client_context_t*) at ??:?
0x4021db2c: comms_loop() at ??:?
0x4022ae01: homekit_server_process(homekit_server_t*) at ??:?
0x4021e96f: loop at ??:?
0x40232858: loop_wrapper() at core_esp8266_main.cpp:?
0x401007d1: cont_wrapper at ??:?