Random timeout connection

Hello guys, on my droplet with Ubuntu Server 16.04 i have problems with connectivity. I receive the connection timeout error randomly. For example, if I run the command $ host -v www.google.com I get this:

# host -v www.google.com
Trying "www.google.com"
;; connection timed out; no servers could be reached

If I do it again, I receive this:

# host -v www.google.com
Trying "www.google.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57226
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.                        IN      A

;; ANSWER SECTION:
www.google.com.         129     IN      A       74.125.206.105
www.google.com.         129     IN      A       74.125.206.99
www.google.com.         129     IN      A       74.125.206.106
www.google.com.         129     IN      A       74.125.206.103
www.google.com.         129     IN      A       74.125.206.104
www.google.com.         129     IN      A       74.125.206.147

Received 128 bytes from 67.207.67.3#53 in 0 ms
Trying "www.google.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47207
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.                        IN      AAAA

;; ANSWER SECTION:
www.google.com.         53      IN      AAAA    2a00:1450:4001:81c::2004

Received 60 bytes from 67.207.67.2#53 in 0 ms
Trying "www.google.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2163
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.google.com.                        IN      MX

;; AUTHORITY SECTION:
google.com.             59      IN      SOA     ns1.google.com. dns-admin.google.com. 191054502 900 900 1800 60

Received 82 bytes from 67.207.67.3#53 in 0 ms

I can not understand what causes this behavior. Also to log in with ssh to the droplet I have to do 3 or more attempts before succeeding, i hope you can help me. Thank you and sorry for the bad english.