Unequal Timer0 count in interrupt mode.

Hi all! Please help me to fix the issue with unequal Timer0 count in interrupt mode. Please check the picture to see the gaps between pulses.

https://ibb.co/fnJkSks

The source code:

DEFINE LOADER_USED 1 'Define loader
DEFINE OSC 4 'Define oscillator

DEFINE HSER_RCSTA 90h 'Enable the receive register
DEFINE HSER_TXSTA 20h 'Enable the transmit register
DEFINE SER_BAUD 9600 'Set the baud rate
DEFINE HSER_BAUD 9600 'Set the baud rate

TRISB.3 = 0

INTCON = 100000 'Enable TMR0 interrupts
OPTION_REG = 000110 'Set prescaler 1:128
TMR0 = 175 'Load TMR0 register

ON INTERRUPT GOTO ISR

loop: 'Short code
PORTB.3 = 1 'Short code
GOTO loop 'Short code

DISABLE 'Disable interrupts
ISR: 'Entry point of the ISR
TMR0 = 175 'Load TMR0 register
HSEROUT [$F8] 'Send a byte
INTCON.2 = 0 'Reset INT0IF flag
RESUME 'Resume main program
ENABLE 'Enable interrupts