Extended sleep mode current consumption

Hello

I am working on extended sleep mode in social distancing tag project.

datasheet the current consumption is given as 7 to 14uA.

In our custom board the current consumption in extended sleep mode is around 50uA to 150uA and the current keeps on varying always from 50uA to 150uA. The device is waking up only in key wakeup controller whenever intrrupt occurs in gpio.

Is there any way to still reduce the current in extended sleep mode. Extended sleep mode current consumption depends on size of ram retention . The size of code after compilation is

Invoking: Cross ARM GNU Print Size
ble_social_distance_tag.elf :
section size addr
.init_text 1192 0
.text 436572 1200
.ARM.exidx 8 437772
.copy.table 36 437780
.zero.table 16 437816
.retention_ram_uninit 128 536871424
.retention_ram_init 15660 536871552
.retention_ram_zi 225632 536887216
.stack_section 520 537112848
.snc_section 692 537113368
.exchange_section 564 537114060
.cmi_section 183296 537114624
.non_retention_ram_init 152 537297920
.bss 29292 537298072
.ARM.attributes 54 0
.comment 481 0
.debug_line 417044 0
.debug_info 1074304 0
.debug_abbrev 101436 0
.debug_aranges 20624 0
.debug_str 794076 0
.debug_loc 348026 0
.debug_ranges 26872 0
.debug_macro 214037 0
.debug_frame 68912 0
.stab 108 0
.stabstr 227 0
Total 3959961

Invoking: Cross ARM GNU Print Size
text data bss dec hex filename
453952 896 438912 893760 da340 ble_social_distance_tag.elf
453952 896 438912 893760 da340 (TOTALS)
Finished building: ble_social_distance_tag.siz

Please let me know any method to still reduce the current consumption and why the current consumption in extended sleep mode is varying from 50uA to 150uA

Thank you
Jagath